mirror of
https://github.com/Eaglercraft-TeaVM-Fork/eagler-teavm.git
synced 2024-12-22 16:14:10 -08:00
C: improve performance of heap dump to hprof converter
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parent
b60d57ea73
commit
c05f40cc6a
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@ -0,0 +1,99 @@
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/*
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* Copyright 2019 konsoletyper.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.teavm.backend.c.util;
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import java.io.IOException;
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import java.io.RandomAccessFile;
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class BufferedFile {
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private RandomAccessFile out;
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private byte[] buffer;
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private int pos;
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BufferedFile(RandomAccessFile out) {
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this.out = out;
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buffer = new byte[4096];
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}
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void flush() throws IOException {
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if (pos > 0) {
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out.write(buffer, 0, pos);
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pos = 0;
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}
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}
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void writeInt(int v) throws IOException {
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byte[] buffer = this.buffer;
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int localPos = pos;
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if (localPos + 4 >= buffer.length) {
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flush();
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localPos = pos;
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}
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buffer[localPos++] = (byte) (v >>> 24);
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buffer[localPos++] = (byte) ((v >>> 16) & 255);
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buffer[localPos++] = (byte) ((v >>> 8) & 255);
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buffer[localPos++] = (byte) (v & 255);
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pos = localPos;
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}
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void writeShort(int v) throws IOException {
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byte[] buffer = this.buffer;
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int localPos = pos;
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if (localPos + 2 >= buffer.length) {
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flush();
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localPos = pos;
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}
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buffer[localPos++] = (byte) ((v >>> 8) & 255);
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buffer[localPos++] = (byte) (v & 255);
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pos = localPos;
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}
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void write(byte[] data) throws IOException {
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write(data, 0, data.length);
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}
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void write(byte[] data, int start, int length) throws IOException {
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if (pos + length >= buffer.length) {
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flush();
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}
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if (length > buffer.length) {
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out.write(data, start, length);
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} else {
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System.arraycopy(data, start, buffer, pos, length);
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pos += length;
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}
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}
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void write(int b) throws IOException {
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if (pos + 1 >= buffer.length) {
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flush();
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}
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buffer[pos++] = (byte) b;
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}
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long getFilePointer() throws IOException {
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return out.getFilePointer() + pos;
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}
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void seek(long pointer) throws IOException {
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flush();
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out.seek(pointer);
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}
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}
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@ -21,7 +21,6 @@ import com.carrotsearch.hppc.LongObjectMap;
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import com.carrotsearch.hppc.ObjectIntHashMap;
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import com.carrotsearch.hppc.ObjectIntHashMap;
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import com.carrotsearch.hppc.ObjectIntMap;
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import com.carrotsearch.hppc.ObjectIntMap;
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import java.io.BufferedInputStream;
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import java.io.BufferedInputStream;
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import java.io.DataOutput;
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import java.io.FileInputStream;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.io.InputStreamReader;
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@ -215,9 +214,12 @@ public final class HeapDumpConverter {
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output.write("JAVA PROFILE 1.0.2\0".getBytes(StandardCharsets.UTF_8));
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output.write("JAVA PROFILE 1.0.2\0".getBytes(StandardCharsets.UTF_8));
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output.writeInt(idSize);
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output.writeInt(idSize);
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output.writeLong(System.currentTimeMillis());
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output.writeLong(System.currentTimeMillis());
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writeSymbols(output, symbolTable);
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writeStack(output, symbolTable);
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BufferedFile bufferedOutput = new BufferedFile(output);
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writeHeapDump(reader, output, symbolTable);
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writeSymbols(bufferedOutput, symbolTable);
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writeStack(bufferedOutput, symbolTable);
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writeHeapDump(reader, bufferedOutput, symbolTable);
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bufferedOutput.flush();
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output.write(0x2C);
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output.write(0x2C);
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output.writeInt(0);
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output.writeInt(0);
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@ -225,7 +227,7 @@ public final class HeapDumpConverter {
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output.setLength(output.getFilePointer());
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output.setLength(output.getFilePointer());
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}
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}
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private static void writeSymbols(RandomAccessFile output, SymbolTable symbolTable) throws IOException {
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private static void writeSymbols(BufferedFile output, SymbolTable symbolTable) throws IOException {
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List<String> strings = symbolTable.getStrings();
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List<String> strings = symbolTable.getStrings();
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for (int i = 0; i < strings.size(); ++i) {
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for (int i = 0; i < strings.size(); ++i) {
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byte[] bytes = strings.get(i).getBytes(StandardCharsets.UTF_8);
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byte[] bytes = strings.get(i).getBytes(StandardCharsets.UTF_8);
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@ -238,7 +240,7 @@ public final class HeapDumpConverter {
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}
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}
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}
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}
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private static void writeStack(RandomAccessFile output, SymbolTable symbolTable) throws IOException {
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private static void writeStack(BufferedFile output, SymbolTable symbolTable) throws IOException {
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for (int i = 0; i < symbolTable.stack.size(); ++i) {
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for (int i = 0; i < symbolTable.stack.size(); ++i) {
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Frame frame = symbolTable.stack.get(i);
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Frame frame = symbolTable.stack.get(i);
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output.write(4);
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output.write(4);
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@ -271,7 +273,7 @@ public final class HeapDumpConverter {
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}
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}
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}
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}
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private static void writeGcRoots(RandomAccessFile output, SymbolTable symbolTable) throws IOException {
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private static void writeGcRoots(BufferedFile output, SymbolTable symbolTable) throws IOException {
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List<Frame> stack = symbolTable.stack;
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List<Frame> stack = symbolTable.stack;
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for (int i = 0; i < stack.size(); i++) {
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for (int i = 0; i < stack.size(); i++) {
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Frame frame = stack.get(i);
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Frame frame = stack.get(i);
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@ -295,7 +297,7 @@ public final class HeapDumpConverter {
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}
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}
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}
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}
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private static void writeHeapDump(Reader reader, RandomAccessFile output, SymbolTable symbolTable)
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private static void writeHeapDump(Reader reader, BufferedFile output, SymbolTable symbolTable)
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throws IOException {
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throws IOException {
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for (ClassDescriptor classDescriptor : symbolTable.getClasses()) {
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for (ClassDescriptor classDescriptor : symbolTable.getClasses()) {
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if (classDescriptor.primitiveType != null) {
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if (classDescriptor.primitiveType != null) {
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@ -330,7 +332,7 @@ public final class HeapDumpConverter {
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output.seek(pointerBackup);
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output.seek(pointerBackup);
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}
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}
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private static void writeClassObjects(RandomAccessFile output, SymbolTable symbolTable) throws IOException {
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private static void writeClassObjects(BufferedFile output, SymbolTable symbolTable) throws IOException {
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Collection<ClassDescriptor> classes = symbolTable.getClasses();
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Collection<ClassDescriptor> classes = symbolTable.getClasses();
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for (ClassDescriptor cls : classes) {
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for (ClassDescriptor cls : classes) {
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if (cls.primitiveType == null) {
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if (cls.primitiveType == null) {
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@ -339,7 +341,7 @@ public final class HeapDumpConverter {
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}
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}
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}
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}
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private static void writeClassDump(RandomAccessFile output, SymbolTable symbolTable, ClassDescriptor cls)
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private static void writeClassDump(BufferedFile output, SymbolTable symbolTable, ClassDescriptor cls)
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throws IOException {
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throws IOException {
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output.write(0x20);
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output.write(0x20);
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writeId(output, cls.id);
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writeId(output, cls.id);
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@ -377,14 +379,14 @@ public final class HeapDumpConverter {
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}
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}
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static class ObjectDumpVisitor extends JsonAllErrorVisitor {
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static class ObjectDumpVisitor extends JsonAllErrorVisitor {
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private DataOutput output;
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private BufferedFile output;
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private SymbolTable symbolTable;
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private SymbolTable symbolTable;
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private JsonPropertyVisitor propertyVisitor = new JsonPropertyVisitor(true);
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private JsonPropertyVisitor propertyVisitor = new JsonPropertyVisitor(true);
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private long id;
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private long id;
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private long classId;
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private long classId;
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private byte[] data;
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private byte[] data;
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ObjectDumpVisitor(DataOutput output, SymbolTable symbolTable) {
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ObjectDumpVisitor(BufferedFile output, SymbolTable symbolTable) {
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this.output = output;
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this.output = output;
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this.symbolTable = symbolTable;
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this.symbolTable = symbolTable;
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propertyVisitor.addProperty("id", idVisitor);
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propertyVisitor.addProperty("id", idVisitor);
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@ -437,7 +439,7 @@ public final class HeapDumpConverter {
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if (itemCls.primitiveType == null) {
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if (itemCls.primitiveType == null) {
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writeId(output, classId);
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writeId(output, classId);
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} else {
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} else {
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output.writeByte(typeToInt(itemCls.primitiveType));
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output.write(typeToInt(itemCls.primitiveType));
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}
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}
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for (int i = 0; i < size; ++i) {
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for (int i = 0; i < size; ++i) {
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int ptr = i * itemSize;
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int ptr = i * itemSize;
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@ -869,11 +871,11 @@ public final class HeapDumpConverter {
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}
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}
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}
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}
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private static void writeId(DataOutput out, long id) throws IOException {
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private static void writeId(BufferedFile out, long id) throws IOException {
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writeLongBytes(out, id, idSize);
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writeLongBytes(out, id, idSize);
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}
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}
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private static void writeLongBytes(DataOutput out, long v, int size) throws IOException {
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private static void writeLongBytes(BufferedFile out, long v, int size) throws IOException {
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for (int i = size - 1; i >= 0; --i) {
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for (int i = size - 1; i >= 0; --i) {
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buffer[i] = (byte) (v & 255);
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buffer[i] = (byte) (v & 255);
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v >>>= 8;
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v >>>= 8;
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